'''3) Skill VS vs Max QL Data For Supreme Pickaxe With 100 Mining Imbue:'''
If you plot skill (x) and max ore ql (y) you get y=0.5861x+41. The R squared correlation is 0.9999 (this would be 1 if the data was perfect; 0.9999 is really good).
'''4) Skill VS vs Max QL Data For Rare Pickaxe With No Imbue:'''
The formula for this one is y=0.9187x+7.9445 (R-squared = 1).